Bug#353494: Cyrix CPUID disabled on newer 2.6 kernels?

[Lee Cremeans <lee@lcremeans.homeip.net>]

I think I may have found the part that's causing trouble here.

In fb/fbpict.c, there's a function fbHaveMMX that uses inline assembler, 
and appears to check for a 486 before trying to use CPUID. The Cyrix 
chips support CPUID, but it's turned off by default (!!), so trying to 
use it here makes the processor throw a SIGILL. (The kernel should be 
enabling this, but in 2.6.16 it's not fsr...)

I'm going to check my kernel config to make sure the Cyrix hacks haven't 
been removed or disabled; if that's the case, I'll check with that 
kernel and report back. In any case, this doesn't appear to be a problem 
with X.org as much as it is a faulty kernel config.

-lee